Please answer these questions right the pictures are posted below.
X Connect X C A Sample Of 341 Subscribers To x G Thirty-five items are randomly sex + ezto.mheducation.com/ext/map/index.html?_con=con&external_browser=0&launchUrl=https%253A%252F%252Fnewconnect.mheducation.com%252F#/activity/qu... RADED ASSIGNMENT-6: CH-8-DUE OCT. 26 1 Saved Help Save & Exit Submit 3 Check my work A sample of 341 subscribers to Wired magazine shows the mean time spent using the Internet is 12.7 hours per week, with a sample standard deviation of 5.7 hours Find the 90% confidence interval for the mean time Wired subscribers spend on the Internet. (Round the final answers to 2 decimal points places.) The confidence interval is between 12.30 and 13.09 Book References Mc Graw 1:56 PM Type here to search O 10/20/2020 Ovo Home End Insert Delete SC co F11 F12 F1 F2 F3 F5 F6 E7 FB F10 Lock Backsp @ 6 8x Connect x C Exercise 8-9 Bob Nale Is The Ow x + ezto.mheducation.com/ext/map/index.html?_con=con&external_browser=0&launchUrl=https%253A%252F%252Fnewconnect.mheducation.com%252F#/activity/qu... * GRADED ASSIGNMENT-6: CH-8-DUE OCT. 26 1 Saved Help Save & Exit Submit 4 Check my work Bob Nale is the owner of Nale's Texaco GasTown. Bob would like to estimate the mean number of litres (L) of gasoline sold to his customers. Assume the number of litres sold follows the normal distribution with a standard deviation of 30 L. From his records, he selects a random sample of 24 sales and finds the mean number of litres sold is 74. 10 points a. What is the point estimate of the population mean? (Round the final answer to the nearest whole number.) The point estimate of the population mean is 74 litres Book References b. Develop a 90% confidence interval for the population mean. (Round the final answers to 3 decimal places.) The 90% confidence interval for the population mean is between | 63.927 and 84.074 . c. Interpret the meaning of part (b). If 100 such intervals were determined, the population |mean would be included in about 90 intervals . Graw Hill 2:03 PM Type here to search O 10/20/2020 10VO Home End Insert Delete ESC F10 F11 E12 nLock F1 F2 F3 A X F5 F6 a S 8 Backsp 6 O 4 5X Connect x C Exercise 8-9 Bob Nale Is The x (1 unread) - traevond@rog x C Thirty-five Items Are Rando x + ezto.mheducation.com/ext/map/index.html?_con=con&external_browser=0&launchUrl=https%253A%252F%252Fnewconnect.mheducation.com%252F#/activity/qu.. GRADED ASSIGNMENT-6: CH-8-DUE OCT. 26 Saved Help Save & Exit Submit Check my work Thirty-five items are randomly selected from a population of 370 items. The sample mean is 34, and the sample standard deviation 8. Develop a 90% confidence interval for the population mean. (Round the t-value to 3 decimal places. Round the final answers to 2 decimal places.) 10 points The confidence interval is between 31.71 and eBook hs References Graw Prev 1 of 10 Next > Om 2:04 PM Type here to search 10/20/2020 novo Home End Insert Delete Esc X F11 F12 FA F5 E6 FnLock F1 F2 Backspa a S 6 9 0 5 U O PHecho en X Connect x C Search Textbook Solutions | Cher X G Out of a sample of 440 students x + ezto.mheducation.com/ext/map/index.html?_con=con&external_browser=0&launchUrl=https%253A%252F%252Fnewconnect.mheducation.com%252F#/activity/qu GRADED ASSIGNMENT-6: CH-8-DUE OCT. 26 i Saved Help Save & Exit Subn Check my work 7 Out of a sample of 440 students, 280 indicated that they preferred chocolate ice cream to vanilla ice cream. a. Estimate the value of the population proportion of those who preferred chocolate ice cream. (Round the final answer to 3 decimal 10 places.) points Estimated population proportion eBook b. Compute the standard error of the proportion. (Round the final answer to 4 decimal places.) References Standard error of the proportion c. Determine a 90% confidence interval for the population proportion of those who preferred chocolate ice cream. (Round the final answers to 3 decimal places.) Confidence interval for the population proportion is between and d. Interpret your findings. If 440 such intervals were determined, the population |(Click to select) | would be included in about intervals. Graw Hill Type here to search O 9 10/2 Ovo X Home End Insert F1 F2 F3 F4 F5 F6 F7 FB F9 F10 F11 F12 @ S 8 9x Connect C Search Textbook Solutions | Cher X G Out of a sample of 440 students, X + ezto.mheducation.com/ext/map/index.html?_con=con&external_browser=0&launchUrl=https%253A%252F%252Fnewconnect.mheducation.com%252F#/activity/qu... ADED ASSIGNMENT-6: CH-8-DUE OCT. 26 i Saved Help Save & Exit Submit 9 Check my work A processor of carrots cuts the green top off each carrot, washes the carrots, and inserts six to a package. Twenty packages are inserted in a box for shipment. To test the mass of the boxes, a few were checked. The mean mass was 9.3 kg, the standard deviation 0.16 kg. How many boxes must the processor sample to be 95% confident that the sample mean does not differ from the population mean by more than 0.07 kg? (Round the intermediate calculation to 2 decimal places. Round the final answer to the nearest whole points number.) Sample size eBook hs References ype here to search O 9 2:31 PM 10/20/202X Connect x C Search Textbook Solutions | Cher X G Out of a sample of 440 students, x + ezto.mheducation.com/ext/map/index.html?_con=con&external_browser=0&launchUrl=https%253A%252F%252Fnewconnect.mheducation.com%252F#/activity/qu.. ADED ASSIGNMENT-6: CH-8-DUE OCT. 26 Saved Help Save & Exit Submit Check my work 10 High Point. Furniture Land surveyed 590 consumers and found that 456 were enthusiastic about a new home decor it plans to show in its store in Construct the 95% confidence interval for the population proportion. (Round the final answers to 3 decimal places.) ints Confidence interval for the population proportion is and eBook References Graw Type here to search O @ 9 2:32 PM 10/20/2020 X 'S Home End Insert Del F8 F11 F12X Connect x C Search Textbook Solutions | Chec X G Out of a sample of 440 students. X + ezto.mheducation.com/ext/map/index.html?_con=con&external_browser=0&launchUrl=https%253A%252F%252Fnewconnect.mheducation.com%252F#/acti GRADED ASSIGNMENT-6: CH-8-DUE OCT. 26 @ Saved Help Save & Exit 2 Check my b-1. Explain why we need to use the t distribution. Use the t distribution as the population standard deviation is unknown. 10 b-2. What assumption do you need to make? points We must assume that the population is normally distributed. eBook c. For a 80% confidence interval, what is the value of t? (Round the final answer to 3 decimal places.) References The value of tis 1.323 d. Develop the 80% confidence interval for the population mean. (Round the final answers to 2 decimal places.) The 80% confidence interval for the population mean is 18.74 to 23.26 e. Would it be reasonable to conclude that the population mean is 24 eggs? No What about 28 eggs? No Mc Graw Type here to search O OVO X R O Home End Ins F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12
